If you had the time or inclination to count, you would apparently discover that over 10,000 diamonds make up this display of power and Royal affluence at Buckingham Palace, which features pieces from The Queen’s personal hoard of jewels as well as historical items from the Royal Collection.

Hogging 1,333 amidst this extravagant diamond count is the Diadem made for the lavish coronation of George IV in 1821 and worn by The Queen to and from every State Opening of Parliament during her reign.

One of the most widely recognised pieces of Royal jewellery, it also appears atop the Queen’s head on British and Commonwealth stamps and certain issues of banknotes and coinage.

The exhibition also includes jewellery made from the world’s largest diamond, the Cullinan, which weighed 3,106 carats as an uncut stone.

Pieces containing seven of the nine principal stones cut from the original have been reunited, including the Cullinan III and IV Brooch worn by The Queen for the National Service of Thanksgiving for her 2012 Jubilee at St Paul’s Cathedral in June.

Also on display is the miniature crown worn by Queen Victoria for her official Diamond Jubilee portrait in 1897. The crown’s 1,187 diamonds belie its tiny proportions – it measures just 9 x 10cm.

Elsewhere in this opulent display is the Williamson Brooch. Made from what is considered to be the finest pink diamond ever discovered, it was found in Tanzania in 1947 by the Canadian geologist Dr JT Williamson, who gave the uncut stone to Princess Elizabeth for her wedding in November that year.

“The exhibition shows how over the past three centuries monarchs have used diamonds to display magnificence, whether in personal adornment or as a statement of power,” says exhibition curator Caroline de Guitaut.

“Diamonds have of course long been associated with endurance and longevity, so this is a very fitting way to mark Her Majesty’s 60 years on the throne.”

Open 9.45am- 6.30pmAdmission: (Included in ticket to the State Rooms) Adult £18, Over 60/ Student £16.50, Under 17 £10.25, Under 5 Free